/* =============================================================
   Chalo Services LLC — design system
   Modern, responsive, dependency-free.
   ============================================================= */

:root {
  /* Brand palette */
  --indigo-900: #1e1b4b;
  --indigo-700: #4338ca;
  --indigo-600: #4f46e5;
  --indigo-500: #6366f1;
  --amber-500: #f59e0b;
  --amber-400: #fbbf24;

  --ink: #0f172a;      /* slate-900 */
  --ink-soft: #334155; /* slate-700 */
  --muted: #64748b;    /* slate-500 */
  --line: #e2e8f0;     /* slate-200 */
  --bg: #ffffff;
  --bg-soft: #f8fafc;  /* slate-50 */
  --bg-tint: #f1f5f9;  /* slate-100 */
  --white: #ffffff;

  --primary: var(--indigo-600);
  --primary-dark: var(--indigo-700);
  --accent: var(--amber-500);

  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06), 0 1px 3px rgba(15, 23, 42, .08);
  --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, .10), 0 8px 10px -6px rgba(15, 23, 42, .08);
  --shadow-lg: 0 25px 50px -12px rgba(30, 27, 75, .25);

  --container: 1160px;
  --font: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

  --ease: cubic-bezier(.16, 1, .3, 1);
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  color: var(--ink-soft);
  background: var(--bg);
  line-height: 1.65;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--primary); text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--primary-dark); }
ul { list-style: none; padding: 0; }
h1, h2, h3, h4 { color: var(--ink); line-height: 1.15; font-weight: 800; letter-spacing: -.02em; }
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.6rem); }
h3 { font-size: 1.3rem; }
p { color: var(--ink-soft); }
:focus-visible { outline: 3px solid var(--indigo-500); outline-offset: 2px; border-radius: 4px; }

/* ---------- layout ---------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section--tint { background: var(--bg-soft); }
.section--ink {
  background: radial-gradient(1200px 600px at 80% -10%, rgba(99,102,241,.25), transparent 60%),
              linear-gradient(160deg, var(--indigo-900), #12102e 70%);
  color: #cbd5e1;
}
.section--ink h2, .section--ink h3 { color: #fff; }

.eyebrow {
  display: inline-block;
  font-size: .8rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
  color: var(--primary);
  background: rgba(79, 70, 229, .08);
  padding: 6px 14px; border-radius: 100px; margin-bottom: 18px;
}
.section--ink .eyebrow { color: var(--amber-400); background: rgba(251,191,36,.12); }

.section-head { max-width: 720px; margin: 0 auto 56px; text-align: center; }
.section-head p { font-size: 1.12rem; color: var(--muted); margin-top: 16px; }
.section--ink .section-head p { color: #94a3b8; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  font-weight: 600; font-size: 1rem; line-height: 1;
  padding: 15px 26px; border-radius: 100px; border: 1.5px solid transparent;
  cursor: pointer; transition: all .25s var(--ease); white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; }
.btn--primary { background: var(--primary); color: #fff; box-shadow: 0 8px 20px -6px rgba(79,70,229,.6); }
.btn--primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 14px 26px -6px rgba(79,70,229,.7); }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn--ghost:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); }
.btn--on-ink { background: #fff; color: var(--indigo-900); }
.btn--on-ink:hover { background: #fff; color: var(--indigo-700); transform: translateY(-2px); box-shadow: 0 14px 30px -8px rgba(0,0,0,.5); }
.btn--ghost-ink { background: transparent; color: #fff; border-color: rgba(255,255,255,.3); }
.btn--ghost-ink:hover { color: #fff; border-color: #fff; background: rgba(255,255,255,.06); transform: translateY(-2px); }

/* ---------- header / nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.82); backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 800; color: var(--ink); letter-spacing: -.02em; font-size: 1.22rem; }
.brand:hover { color: var(--ink); }
.brand__mark { width: 34px; height: 34px; flex: none; }
.brand__mark rect { fill: url(#cg); }
.nav__links { display: flex; align-items: center; gap: 6px; }
.nav__links a {
  color: var(--ink-soft); font-weight: 500; font-size: .98rem;
  padding: 9px 14px; border-radius: 10px; transition: all .2s var(--ease);
}
.nav__links a:hover { color: var(--ink); background: var(--bg-tint); }
.nav__links a.active { color: var(--primary); }
.nav__cta { margin-left: 10px; }
.nav__toggle {
  display: none; background: none; border: 0; cursor: pointer; padding: 8px;
  width: 44px; height: 44px; border-radius: 10px;
}
.nav__toggle span { display: block; width: 22px; height: 2px; background: var(--ink); margin: 5px auto; transition: .3s var(--ease); border-radius: 2px; }
.nav__toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background: radial-gradient(1000px 500px at 90% -20%, rgba(99,102,241,.28), transparent 55%),
              radial-gradient(800px 500px at -10% 110%, rgba(245,158,11,.14), transparent 55%),
              linear-gradient(165deg, #14113a, #1e1b4b 60%, #191636);
  color: #cbd5e1; padding: 96px 0 108px;
}
.hero__grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.hero h1 { color: #fff; }
.hero h1 .grad { background: linear-gradient(100deg, var(--amber-400), #fca5a5); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero__lead { font-size: 1.22rem; color: #b6bfd4; margin-top: 22px; max-width: 560px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.hero__trust { margin-top: 40px; color: #8b93ad; font-size: .9rem; }
.hero__trust strong { color: #e2e8f0; }

/* floating product chips in hero visual */
.hero__visual { position: relative; min-height: 380px; }
.orb { position: absolute; border-radius: 24px; background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12);
  backdrop-filter: blur(6px); padding: 18px 20px; box-shadow: var(--shadow-lg); animation: float 6s ease-in-out infinite; }
.orb h4 { color: #fff; font-size: 1.02rem; margin-bottom: 4px; }
.orb p { color: #9aa3ba; font-size: .82rem; margin: 0; }
.orb__ic { width: 40px; height: 40px; border-radius: 11px; display: grid; place-items: center; margin-bottom: 12px; }
.orb__ic svg { width: 22px; height: 22px; color: #fff; }
.orb--1 { top: 6%; left: 4%; animation-delay: 0s; }
.orb--2 { top: 40%; right: 2%; animation-delay: 1.4s; }
.orb--3 { bottom: 2%; left: 18%; animation-delay: .7s; }
.orb--1 .orb__ic { background: linear-gradient(135deg, #6366f1, #4338ca); }
.orb--2 .orb__ic { background: linear-gradient(135deg, #10b981, #059669); }
.orb--3 .orb__ic { background: linear-gradient(135deg, #f59e0b, #d97706); }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-14px); } }

/* ---------- stat band ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat { text-align: center; }
.stat__num { font-size: clamp(2rem, 4vw, 2.9rem); font-weight: 800; color: #fff; letter-spacing: -.03em; line-height: 1; }
.stat__num .u { color: var(--amber-400); }
.stat__label { color: #94a3b8; margin-top: 10px; font-size: .95rem; }

/* ---------- product cards ---------- */
.products { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.pcard {
  display: flex; flex-direction: column;
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px; box-shadow: var(--shadow-sm); transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
  position: relative; overflow: hidden;
}
.pcard::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 4px; background: var(--bar, var(--primary)); }
.pcard:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }
.pcard__ic { width: 54px; height: 54px; border-radius: 14px; display: grid; place-items: center; margin-bottom: 20px; background: var(--bar, var(--primary)); }
.pcard__ic svg { width: 28px; height: 28px; color: #fff; }
.pcard__name { display: flex; align-items: baseline; gap: 8px; }
.pcard__name h3 { color: var(--ink); }
.pcard__host { font-size: .82rem; color: var(--muted); font-weight: 600; }
.pcard p { margin-top: 12px; }
.pcard__list { margin-top: 18px; display: grid; gap: 9px; }
.pcard__list li { display: flex; gap: 10px; align-items: flex-start; font-size: .95rem; color: var(--ink-soft); }
.pcard__list svg { width: 18px; height: 18px; color: var(--bar, var(--primary)); flex: none; margin-top: 3px; }
.pcard__link { margin-top: auto; padding-top: 22px; font-weight: 600; display: inline-flex; align-items: center; gap: 7px; color: var(--bar, var(--primary)); }
.pcard__link svg { width: 17px; height: 17px; transition: transform .2s var(--ease); }
.pcard:hover .pcard__link svg { transform: translateX(4px); }

/* ---------- feature/service grid ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.fcard {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px; box-shadow: var(--shadow-sm); transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.fcard:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.fcard__ic { width: 50px; height: 50px; border-radius: 13px; display: grid; place-items: center; margin-bottom: 18px;
  background: linear-gradient(135deg, rgba(79,70,229,.12), rgba(99,102,241,.08)); }
.fcard__ic svg { width: 25px; height: 25px; color: var(--primary); }
.fcard h3 { font-size: 1.15rem; margin-bottom: 8px; }
.fcard p { font-size: .98rem; }

/* ---------- why / split ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.checklist { display: grid; gap: 18px; margin-top: 26px; }
.checklist li { display: flex; gap: 14px; align-items: flex-start; }
.checklist .ci { width: 30px; height: 30px; border-radius: 9px; background: rgba(16,185,129,.12); display: grid; place-items: center; flex: none; }
.checklist .ci svg { width: 17px; height: 17px; color: #059669; }
.checklist h4 { font-size: 1.05rem; color: var(--ink); margin-bottom: 3px; }
.checklist p { font-size: .95rem; margin: 0; }

/* ---------- CTA band ---------- */
.cta-band { text-align: center; }
.cta-band h2 { color: #fff; max-width: 660px; margin: 0 auto; }
.cta-band p { color: #94a3b8; font-size: 1.12rem; margin: 18px auto 32px; max-width: 560px; }
.cta-band .hero__actions { justify-content: center; }

/* ---------- page hero (inner pages) ---------- */
.page-hero {
  background: radial-gradient(900px 400px at 85% -30%, rgba(99,102,241,.3), transparent 55%),
              linear-gradient(165deg, #14113a, #1e1b4b);
  color: #cbd5e1; padding: 76px 0; text-align: center;
}
.page-hero h1 { color: #fff; }
.page-hero p { color: #b6bfd4; font-size: 1.18rem; max-width: 640px; margin: 18px auto 0; }
.crumb { color: #8b93ad; font-size: .9rem; margin-bottom: 16px; }
.crumb a { color: var(--amber-400); }

/* ---------- product detail rows ---------- */
.pdetail { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.pdetail:not(:last-child) { margin-bottom: 90px; }
.pdetail__badge { display: inline-flex; align-items: center; gap: 9px; font-weight: 700; color: var(--ink);
  padding: 8px 15px; border-radius: 100px; border: 1px solid var(--line); background: var(--white); box-shadow: var(--shadow-sm); font-size: .95rem; }
.pdetail__badge .dot { width: 22px; height: 22px; border-radius: 7px; display: grid; place-items: center; }
.pdetail__badge .dot svg { width: 13px; height: 13px; color: #fff; }
.pdetail h2 { margin: 20px 0 14px; }
.pdetail__mock {
  border-radius: var(--radius); padding: 30px; color: #fff; min-height: 300px;
  display: flex; flex-direction: column; justify-content: center; box-shadow: var(--shadow-lg); position: relative; overflow: hidden;
}
.pdetail__mock h4 { color: #fff; font-size: 1.4rem; }
.pdetail__mock .tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.pdetail__mock .tags span { background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.18); padding: 6px 12px; border-radius: 100px; font-size: .82rem; }
.mock--smtps { background: linear-gradient(135deg, #4338ca, #6366f1); }
.mock--5ymail { background: linear-gradient(135deg, #059669, #10b981); }
.mock--ihost { background: linear-gradient(135deg, #d97706, #f59e0b); }
.mock--code { font-family: 'SFMono-Regular', ui-monospace, Menlo, Consolas, monospace; font-size: .84rem; line-height: 1.7; }
.mock--code .k { color: #fcd34d; } .mock--code .s { color: #86efac; } .mock--code .c { color: #94a3b8; }
.reverse .pdetail__badge, .reverse h2, .reverse p, .reverse .checklist { order: 2; }
@media (min-width: 861px){ .reverse > *:first-child { order: 2; } }

/* ---------- vertical pills ---------- */
.pills { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-top: 8px; }
.pill { background: var(--white); border: 1px solid var(--line); border-radius: 100px; padding: 11px 20px; font-weight: 600; color: var(--ink-soft); box-shadow: var(--shadow-sm); font-size: .95rem; }

/* ---------- contact ---------- */
.contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 50px; align-items: start; }
.contact-card { display: flex; gap: 16px; padding: 22px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); box-shadow: var(--shadow-sm); margin-bottom: 16px; }
.contact-card__ic { width: 46px; height: 46px; border-radius: 12px; background: linear-gradient(135deg, rgba(79,70,229,.12), rgba(99,102,241,.08)); display: grid; place-items: center; flex: none; }
.contact-card__ic svg { width: 22px; height: 22px; color: var(--primary); }
.contact-card h4 { color: var(--ink); font-size: 1.02rem; margin-bottom: 2px; }
.contact-card a, .contact-card p { color: var(--ink-soft); font-size: .98rem; }
.contact-card a:hover { color: var(--primary); }
.form { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow-md); }
.field { margin-bottom: 18px; }
.field label { display: block; font-weight: 600; color: var(--ink); font-size: .92rem; margin-bottom: 7px; }
.field input, .field select, .field textarea {
  width: 100%; font: inherit; font-size: .98rem; color: var(--ink);
  padding: 13px 15px; border: 1.5px solid var(--line); border-radius: var(--radius-sm); background: var(--bg-soft);
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 4px rgba(79,70,229,.12); background: #fff; }
.field textarea { resize: vertical; min-height: 130px; }
.form .btn { width: 100%; justify-content: center; }
.form__note { font-size: .85rem; color: var(--muted); margin-top: 14px; text-align: center; }

/* ---------- legal / prose ---------- */
.legal { max-width: 820px; margin: 0 auto; }
.legal__meta { color: var(--muted); font-size: .95rem; margin-bottom: 30px; }
.legal__intro { font-size: 1.1rem; color: var(--ink-soft); }
.legal h2 { font-size: 1.35rem; margin: 42px 0 14px; padding-top: 6px; }
.legal h3 { font-size: 1.08rem; margin: 24px 0 8px; }
.legal p { margin-bottom: 16px; }
.legal ul { margin: 0 0 18px; display: grid; gap: 10px; }
.legal ul li { position: relative; padding-left: 24px; }
.legal ul li::before { content: ""; position: absolute; left: 4px; top: 11px; width: 6px; height: 6px; border-radius: 50%; background: var(--primary); }
.legal a { text-decoration: underline; text-underline-offset: 2px; }
.legal .callout {
  background: var(--bg-soft); border: 1px solid var(--line); border-left: 4px solid var(--primary);
  border-radius: var(--radius-sm); padding: 18px 20px; margin: 8px 0 26px;
}
.legal .callout p:last-child { margin-bottom: 0; }
.legal .legal-nav { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 40px; padding-top: 26px; border-top: 1px solid var(--line); font-size: .95rem; }

/* ---------- footer ---------- */
.site-footer { background: #0d0b24; color: #94a3b8; padding: 72px 0 30px; }
.footer__top { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 46px; border-bottom: 1px solid rgba(255,255,255,.08); }
.footer__brand .brand { color: #fff; margin-bottom: 16px; }
.footer__brand p { color: #8b93ad; font-size: .95rem; max-width: 320px; }
.footer__brand .brand:hover { color: #fff; }
.footer h5 { color: #fff; font-size: .9rem; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 18px; }
.footer ul { display: grid; gap: 11px; }
.footer ul a { color: #94a3b8; font-size: .95rem; }
.footer ul a:hover { color: #fff; }
.footer__bottom { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding-top: 26px; flex-wrap: wrap; font-size: .88rem; color: #6b7490; }
.footer__bottom a { color: #94a3b8; }
.footer__bottom a:hover { color: #fff; }

/* Envelope icon before every email (mailto) link in the footer + contact card */
.site-footer a[href^="mailto:"],
.contact-card a[href^="mailto:"] { display: inline-flex; align-items: center; gap: 8px; }
.site-footer a[href^="mailto:"]::before,
.contact-card a[href^="mailto:"]::before {
  content: ""; width: 15px; height: 15px; flex: none; background-color: currentColor;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='2' y='4' width='20' height='16' rx='2'/%3E%3Cpath d='m22 7-10 5L2 7'/%3E%3C/svg%3E") center / contain no-repeat;
          mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='2' y='4' width='20' height='16' rx='2'/%3E%3Cpath d='m22 7-10 5L2 7'/%3E%3C/svg%3E") center / contain no-repeat;
}

/* ---------- reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .orb { animation: none; }
  html { scroll-behavior: auto; }
}

/* ---------- responsive ---------- */
@media (max-width: 980px) {
  .hero__grid, .split, .pdetail, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero__visual { min-height: 300px; order: -1; }
  .products, .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); gap: 34px 24px; }
  .footer__top { grid-template-columns: 1fr 1fr; gap: 34px; }
}
@media (max-width: 720px) {
  .section { padding: 68px 0; }
  .nav__cta { display: none; }
  .nav__toggle { display: block; }
  .nav__links {
    position: fixed; inset: 72px 0 auto 0; flex-direction: column; align-items: stretch; gap: 4px;
    background: #fff; border-bottom: 1px solid var(--line); padding: 14px 20px 22px;
    box-shadow: var(--shadow-md); transform: translateY(-130%); transition: transform .35s var(--ease); visibility: hidden;
  }
  .nav__links.open { transform: none; visibility: visible; }
  .nav__links a { padding: 13px 14px; font-size: 1.05rem; }
  .nav__links .btn { margin-top: 8px; justify-content: center; }
  .nav__cta.in-menu { display: inline-flex; }
  .products, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .footer__top { grid-template-columns: 1fr 1fr; }
  .hero { padding: 64px 0 72px; }
  .hero__visual { display: none; }
}
@media (max-width: 460px) {
  body { font-size: 16px; }
  .stats { grid-template-columns: 1fr 1fr; }
  .footer__top { grid-template-columns: 1fr; }
  .hero__actions .btn, .cta-band .btn { width: 100%; justify-content: center; }
}